Bone tumors Flashcards
Aneurysmal bone cyst
mosaic glass on MRI
U in cage on mud
unicameral bone cyst
A of NFC games
aneurysmal bone cyst
Lytic Lesions in Metaphysis Mnemonic
Cage On Mud
Osteoblastoma
most common tumor in teens at ends of long bones-“at end of a long fast, teens have a blast”
large >2cm, without surrounding reactive bone sclerosis as seen in osteoid osteoma
O in FOGMACHINES
Osteoid osteoma/osteoblastoma
M in FOGMACHINES
Metastasis/myeloma
Infection
osteomyelitis-soft tissue swelling, resorptive bone changes….
N of NFC games
Nonossifying fibroma
Ewing’s sarcoma
moth eaten lesion in diaphysis, onion skin appearance, accompanied by a soft tissue mass
most common malignant bone tumor in foot and ankle
chondrosarcoma
What is the most common primary malignant tumor of bone in the body
myeloma-multiple punched out lesions
HIP in COP BOBS HIP
hemangioma, infarct, prostate mets
Bubbly lesions of bone mnemonic
NFC GAMES
Osteoid osteoma
<2cm lesion surrounded by reactive bony sclerosis
<20yo
night pain relieved by ASA or NSAID
G in FOGMACHINES
giant cell tumor
E of NFC games
Enchondroma/Ewing’s sarcoma
Non-ossifying fibroma
cousin of fibrous dysplasia, soap bubble appearance
g in cage on mud
giant cell tumor
A in Cage on mud
aneurysmal bone cyst
N in FOGMACHINES
non-ossifying fibroma
I in FOGMACHINES
infection
e in cage on mud
enchondroma, ewing’s sarcoma
F of NFC games
fibrous dysplasia
Eosinophilic granuloma
endosteal scalloping
Hemangioma capillary
fine capillary loops that radiate peripherally
Long striations with long lucencies
Hyperparathyroidism
brown tumors-hemosiderin deposition, subperiosteal bone resorption is hallmark-especially in phalanges
A in FOGMACHINES
aneurysmal bone cyst
malignant bone lesions in 30-40 and 40+
30-40: fibrosarcoma, lymphoma
40+: metastasis, myeloma, chondrosarcoma
Subungal exostosis
similar to osteochondroma, starts out as a capillary hemangioma, has fibrocartilage cap, does not arise from epiphysis
O in cage on mud
osteoblastoma, osteosarcoma, osteomyelitis
Giant cell tumor
multinucleated tumor giant cells, without a border of periosteal new bone and sclerosis
“massive in metaphysis)
may met to lungs or transform to fibrosarcoma or osteogenic sarcoma
Enchondroma
Bubbly, “end of bone with speckled tone”, associated with Ollier’s disease
COP in COP BOBS HIP
chronic osteomyelitis, osteochondroma, paget’s disease
Malignant bone lesions in 10-30 year olds
osteosarcoma, ewing’s
fibrous dysplasia
non neoplastic, long lytic lesion in long bone
C of NFC games
Chonrdosarcoma
C in Cage on Mud
Chondroblastoma
F in Fog machines
fibrous dysplasia
chondromyxoid fibroma
chondroid tissue and intracellular mucin like substance
Solitary bone cyst/unicameral bone cyst
in calcaneus-“best bet is middle facet”, fallen fragment sign
BOBS in COP BOBS HIP
breast mets, osteogenic sarcoma, bone island (most common), stress fx
M of NFC games
Metastatic CA
Osteochondroma
ceases growth at time of skeletal maturation, has a cap of hyaline cartilage and projects away from epiphysis from which it arises
Mnemonic for radiolucent-type lesions
radiolucent=not solid white
FOGMACHINES
H in FOGMACHINES
hyperparathyroidism, hemangioma
C in FOGMACHINES
chondroblastoma/chondromyxoid fibroma
metastasis/meyeloma
most probable cause of osteolytic mets in a child is neuroblastoma
in adult male-CA of lung
female-CA of breast
CA of kidney and thyroid
G of NCF games
Giant cell tumor
D in cage on mud
desmoid tumor
Osteogenic sarcoma/osteosarcoma
in places of active bone growth
m in cage on mud
malignant fibrous histiocytoma (fibrosarcoma)
S of NFC games
Solitary bone cyst
chondroblastoma
chicken wire matrix-also consider osteoblastma in this age group when viewed on x-ray
Chondrosarcoma
malignant transformation of an enchondroma, or by sarcomatous change in cartilage cap of an osteochondroma
Hemangioma cavernous
thin walled vessels and sinuses lined by a single layer of endo cells in intimate relation with the bone trabeculae-causing resorption
long striations with long lucencies
Malignant lucent bone lesions in less than 1 and 1-10 year olds
neuroblastoma
ewing’s sarcoma
n in cage on mud
non-ossifying fibroma
Solitary or multifocal Sclerotic lesions of bone mnemonic
COP BOBS HIP
